Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Yamamoto, Keisuke; Nakagawa, Takuya; Shimojo, Hiroto; Kijima, Jun; Miura, Daiya; Onose, Yoshihiko*; Namba, Koji*; Uchida, Hiroaki*; Sakamoto, Kazuhiko*; Ono, Chika*; et al.
JAEA-Technology 2024-019, 211 Pages, 2025/02
JAEA-Technology-2024-019.pdf:35.35MB
The uranium enrichment facilities at the Nuclear Fuel Cycle Engineering Laboratories of Japan Atomic Energy Agency (JAEA) were constructed sequentially to develop uranium enrichment technology with centrifugal separation method. The developed technologies were transferred to Japan Nuclear Fuel Limited until 2001. And the original purpose has been achieved. Wastewater Treatment Facility, one of the uranium enrichment facilities, was constructed in 1976 to treat radioactive liquid waste generated at the facilities, and it finished the role in 2008. In accordance with the Medium/Long-Term Management Plan of JAEA Facilities, interior equipment installed in this facility had been dismantled and removed since November 2021 to August 2023. This report summarizes the findings obtained through the work related to the contamination inspection methods cancellation the controlled area of Wastewater Treatment Facility from September 2023 to March 2024.
Kageyama, Tomio; Denuma, Akio; Koizumi, Jin*; Odakura, Manabu*; Haginoya, Masahiro*; Isaka, Shinichi*; Kadowaki, Hiroyuki*; Kobayashi, Shingo*; Morimoto, Taisei*; Kato, Yoshiaki*; et al.
JAEA-Technology 2022-033, 130 Pages, 2023/03
JAEA-Technology-2022-033.pdf:9.87MB
Uranium handling facility for development of nuclear fuel manufacturing equipment (Mockup room) was constructed in 1972. The Mockup room has a weak seismic resistance and is deteriorating with age. Also, the original purpose with this facility have been achieved and there are no new development plans using this facility. Therefore, interior equipment installed in this facility had been dismantled and removed since March 2019. After that, the Mockup room was inspected for contamination, and then controlled area in the Mockup room was cancelled on March 29th 2022. A total of 6,549 workers (not including security witnesses) were required for this work. The amount of non-radioactive waste generated by this work was 31,300 kg. The amount of radioactive waste generated by this work was 3,734 kg of combustible waste (103 drums), 4,393 kg of flame resistance waste (61 drums), 37,790 kg of non-combustible waste (124 drums, 19 containers). This report describes about the dismantling and removing the interior equipment in the Mockup room, the amount of waste generated by this work, and procedure for cancellation the controlled area in the facility.
Tomii, Hiroyuki; Matsuo, Kiyoshi*; Shiraishi, Kunio; Kato, Rokuro; Watabe, Kozo; Higashiyama, Yutaka; Nagane, Satoru*; Hanawa, Yukimitsu*
JAERI-Tech 2005-017, 65 Pages, 2005/03
JAERI-Tech-2005-017.pdf:3.79MB
no abstracts in English
Miyo, Hiroaki; Yoshida, Michihiro; ; Asami, Makoto*; Iso, Takahito*; ;
PNC TN8440 96-010, 171 Pages, 1996/03
None
Tachibana, Mitsuo; Hatakeyama, Mutsuo; ; Yanagihara, Satoshi
ICEM 95:Proc. of 5th Int. Conf. on Radioactive Waste management and environmental Remediation,Vol. 2, 0, p.1683 - 1686, 1995/00
no abstracts in English
Nakanishi, Yoshiki; Owada, Mitsuhiro; Aoyama, Yoshio; Suguro, Toshiyasu
no journal, ,
The uranium enrichment facilities at the Nuclear Fuel Cycle Engineering Laboratories of Japan Atomic Energy Agency (JAEA) were constructed sequentially to develop uranium enrichment technologies with centrifugal separation method and consisted of several facilities for R&D objectives. These developed technologies were transferred to Japan Nuclear Fuel Limited by 2001 and the initial goal was achieved. Wastewater Treatment Area, which was constructed treat radioactive liquid waste generated at the facilities, was to be decommissioned for the role of end and deterioration over time. Decommissioning of the facility included dismantling and removal of interior facilities and radiation measurements from 2003 to 2023 in preparation for cancellation the controlled area. This presentation is summary of the Wastewater Treatment Area decommissioning.
Yamamoto, Keisuke; Nakagawa, Takuya; Matsuo, Kazuomi; Suguro, Toshiyasu
no journal, ,
Wastewater Treatment Area was constructed to treat radioactive liquid waste generated at the uranium enrichment facilities. The interior equipment installed in this facility was to be dismantled and removed by 2023. After that, contamination inspection for cancellation the controlled area was conducted, and it was confirmed that there was no contamination in the targeted area. In addition, to reduce the amount of radioactive waste, contamination inspection and investigation of building usage history for confirmation of non-radioactive waste was performed on concrete and other building materials, and the results were found to be below the lower detection limit. This presentation shows the findings obtained through the work related to contamination inspection for cancellation the controlled area.